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GEN 1 (2010-2014) Ford SVT Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
6.2L Leaking Coolant at the Thermostat Housing
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<blockquote data-quote="Ruger" data-source="post: 1321905" data-attributes="member: 1594"><p>I had not fully drained the system and was getting hot air from the air vents, so I have opted not to remove the hose to the heater core as the instructions indicated. I have read that the difficulty with these systems is that the heater core is so high up in the vehicle that it tends to trap air. (That's probably why the maintenance manual tells you to remove the heater hose and fill the radiator till it runs out of that hose.) So what I did is jack up the front of the truck so that the radiator is hopefully above the heater core and the air trapped in the system is driven out of the heater core to the radiator. To assist that further, I jacked up the driver side of the vehicle a little higher than the passenger side because the radiator cap and overflow reservoir are both on the driver's side. Then, per the maintenance manual, I started the truck, turned the heat knob all the way up, the fan on high, opened the AC vents on the dash, and let it idle until it reached normal operating temperature and the upper radiator hose was hot to the touch. That took well over a half hour. Now I'm letting it cool, and we'll see if the system will accept any additional coolant. If not, I'll have to jack it up even further and repeat. Good thing there's beer in the house because this is going to take all day. I can't believe that the Ford mechanics tie up a bay all day to do this.</p></blockquote><p></p>
[QUOTE="Ruger, post: 1321905, member: 1594"] I had not fully drained the system and was getting hot air from the air vents, so I have opted not to remove the hose to the heater core as the instructions indicated. I have read that the difficulty with these systems is that the heater core is so high up in the vehicle that it tends to trap air. (That's probably why the maintenance manual tells you to remove the heater hose and fill the radiator till it runs out of that hose.) So what I did is jack up the front of the truck so that the radiator is hopefully above the heater core and the air trapped in the system is driven out of the heater core to the radiator. To assist that further, I jacked up the driver side of the vehicle a little higher than the passenger side because the radiator cap and overflow reservoir are both on the driver's side. Then, per the maintenance manual, I started the truck, turned the heat knob all the way up, the fan on high, opened the AC vents on the dash, and let it idle until it reached normal operating temperature and the upper radiator hose was hot to the touch. That took well over a half hour. Now I'm letting it cool, and we'll see if the system will accept any additional coolant. If not, I'll have to jack it up even further and repeat. Good thing there's beer in the house because this is going to take all day. I can't believe that the Ford mechanics tie up a bay all day to do this. [/QUOTE]
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GEN 1 (2010-2014) Ford SVT Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
6.2L Leaking Coolant at the Thermostat Housing
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